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Published byMerry Edwards Modified over 9 years ago
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Protists What is a protist? Protist Diversity Diseases Caused by protists
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Protists Have Complex Cells Eukaryotic-with a nuclear membrane Membrane bound organelles Single-celled and multicellular algae
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Movement Flagellum- whip-like tail –Euglena, Dinoflagellates Cilia-hair-like projections that work like oars in water –Paramecium Pseudopods (false foot) –Amoeba
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Amoeba
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Paramecium
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Diatoms
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Dinoflagellate = red tide
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Euglena
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Algae
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Spirogyra
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Stentor
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Vorticella
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Volvox –colony protists
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Respond to the environment Detect light, touch, and chemical changes in their environment. Eyespots and other organelles detect these changes
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Reproduction Because eukaryotes have numerous chromosomes, Meiosis (gametes form) Mitosis (conjugation-joining gametes)
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Evolutionary Lines Prokaryotes Heterotrophic bacteria = mitochondria Autotrophic bacteria = chloroplasts Eukaryotes Plants evolve from autotrophic protists Animals and fungi have evolved from heterotrophic protists
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Autotrophic Protists Microscopic Diatoms, phytoplankton, zooplankton Brown, Green, Red algae are multi-cellular (sea weeds)
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Heterotrophic Protists Consumers Slime molds, water molds Amoeba, Paramecium, Stentor (animal-like) Trichonympha in termite guts Plasmodium causes malaria
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Diseases Anopheles (mosquitoes) bite infected animal. Spores form in mosquito gut. Spores are injected into host and reproduce in blood cells. Asexual spores infect liver and burst out of cells
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Diseases Caused by Protists DiseaseHostOrganism Amoebic dysentary HumansEntamoeba Malaria Toxoplamosis Humans Cats/humans Plasmodium Toxoplasma Giardiasis Sleeping Sickness Leishmaniasis Humans Tsetse flies Sand flies Giardia Trypanosoma Leishmania Late blightPotatoesPhytophthora
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